Variable magnetic-opposed reaction-coil electric circuit.



I. E. ASKE. VARIABLE MAGNETIC OPPOSED REACTION COIL ELECTRIC CIRCUIT.

APPLICATION FILED JUNE II, I915- Patented Mar. 27,1917.

MAG/ 5m Irv-" 10 M m 2.; ATTORNEY IRVING IE. ASKE, OF DULUTH, MINNESOTA,ASSIGNOR T0 ASKE nuroivrnrrcfvonrlton REGULATOR COMPANY, A CORPORATIONOF DELAWARE. I

VARIABLE MAGNETIC-OPPOSED REACTION-COIL ELECTRIC CIRCUIT.

Specification of Letters Patent.

Patented Mar. 2'7,

Application filed .Tune 11, 1915. Serial No. 33,511.

To all whom it may concern:

Be it known that I, IRVING E. AsKn, a citizen of the United States,residing at Duluth, in the county of St. Louis and State of Minnesota,have invented certain new and useful Improvements in Variable Magnetic-Opposed Reaction-Coil Electric Circuits, of which I do hereby declarethe following to be a specification.

My invention relates to variable magneticopposed reaction-coil electriccircuits and has for its object the provision of means for electricallyoperating a plurality of mecha nisms or translation devicessimultaneously or any of them separately in which operating means thecurrent flow to each such mechanism will be automatically controlled orgoverned.

Under the former system of magneto elec tric lighting of certainautomobile head lights, a great range of voltage variation existed,extending from 6 to 18 volts, which necessitated the use of high voltagelamps in parallel operation, or of low voltage lamps connected inseries. In both these systems the efliciency of the lamps is very lowwhen the magneto is running slow. This is a very undesirable condition,since it is when the vehicle is running slow as over bad roads that thegreatest amount of light is needed. An-

other disadvantage of series lighting is that when one lamp goes out,the whole series is extinguished. By employing my invention both thesedisadvantages may be avoided. By connecting low voltage lamps inparallel in accordance with my invention for controlling them a nearlyconstant intensity of light can be maintained.

In the drawings Figure 1 is a diagrammatic view of one form of my saidinvention. Fig. 2, is a. perspective view of the preferred form of areactance coil and core forming part of my said invention. Fig. 3, is aplan view of the top plate forming part of sa d core. Fig. 4 is a planview of an 1ntermed1- ate plate forming part of said core and Fig.

'5 is a diagrammatic view of a modified form of my said invention.

Referring to the drawings, my -1I1V6I1t1QD.

embodies a suitable, source of electricity as a magneto 1; a magnet coreA, preferably composed of a plurality of superposed plates as 2, 2insulated from each other by any suitable interposed insulating materialas at 2 an electric conductor 3 connected at-one terminal with one ofthe poles of said source of electricity and preferably wound in acontinuous direction of rotation intwoelectrically serial, mechanicallyparallel coils as 3, 3, upon said core, the opposite end of saidconductor being electrically connected of each of said translationdevices as at 7, 7 7. The turns of the core windings in each coil areinsulated from each other-and from the core in any suitable manner, orby any suitable insulating material. The several plates embodied in saidpreferred, form of core, are preferably stamped fronrthin soft ironsheets, the top and bottom plates preferably extending at the cornersslightly beyond the intermediate plates to form: lips for engaging theclamping bolts 8 by which the pile of plates is held together ,so as toform a unitary structure. Each of said plates has formed therein acentral aperture 9 for the passage of one side of each of said coils.Upon one of the walls of said core one of said coils is wound, and uponthe opposite wall of said core theother of said coils is preferablywound, a greater number, preferably twice as many turns of wire orconductor preferably being given to the coil 3 than to the coil 3 Thetop and bottom plates are preferably provided with ears, as 10 by meansof which the core may be secured to a suitable support. If desired, the

two coils may within the scope of my inven tion and of certain of myclaims be. concentrically wound in opposite directions upon one wall ofsaid core as shown in Fig. 5, with approximately the same result as ifrespectively wound in the same direction of rotation on different wallsof said core.

The operation of my invention depends on an alternating current ofelectricity, and on a variable magnetic field density produced in saidcore by a varying electric current traveling through the first coil 3*.At the point of junction of the conductor 3 and the branch conductor 5,the current divides, part of it flowing to the mechanism or lamp 4, andpart of it flowing to the mechanism or lamp 6, the amount of currentflowing through the coil 3- being the sum of the amount flowing throughthe lamps i and 6. The winding of both coils in the same direction ofrotation on opposite walls of said core, or in opposite directions onone of said walls, produces in the core magnetic poles of like polarity.In operating electric lights in parallel by an alternating current, itwas, prior .to my invention often found impossible to operate the lightsindependently of each other, since when one lamp was extinguished thevoltage increased, causing said other to burn out. To avoid thiscondition and to secure the maintenance of an approximately constantvoltage at .the lamps, whether one or more of the lamps is in operation,is one of the objects of my invention. In my invention, the magneticflux generated by one coil is, when current is flowing through bothcoils, opposed by the flux generated by the other coil, thus causing themagnetic fluxof both coils to thread or flow through the centralaperture 9, and through the surrounding air medium. The choking eflectof either coil is then substantially neutralized by that of the other.VVhenfone lamp is extinguished the voltage increases and tends to forcea greater current through the other lamp, to

prevent which a percentage of unneutralized flux is required.

If the lamp 4 should be extinguished, the magnetic opposition previouslyproduced by the current flowing through coil 3 will cease, and as aresult the magnetic flux produced by coil 3* will thread or flow throughthe iron core which has a lower reluctance than the air medium throughwhich it previously flowed.- Thus the magnetic flux will flow in greaterstrength or volume (even though the ampere turns of the coil 3? are lessthan when carrying current for the coil 3 and will cause a greaterchoking eflect in the coil 3*, therefore, and because the flux is notneutralized by opposing flux, the

higher voltage is prevented from forcing an excessive current throughthe coil 3 and lamp 6.. If, on the other hand, the lamp 6 mamas isextinguished and the lamp 4 continues in circuit, said lamp 4 willcontinue to burn approximately as when both lamps were in circuit;because although there is then mag netic. oppositionbetween the coils,the flux produced by the coil 3 is only one half its former-value, inopposition to the flux generated by coil 3"; thus the excess orunn'eutralizedr flux operates to choke the excessive Having nowdescribed my invention, whatv I claim is 7 1. The combination of asource of alternating electric current, a reactagnce coil comprising acore having two legs connected to each other at each end to form amagnetic circuit, each leg having a coil wound thereon, said coils beingwound in the same direction of rotation and connected to each other inseries, said coils being connected at one end to one of the poles ofsaid source, a translation device connected at one side with theopposite end of said coils, and a translation device connected at oneside to said coils intermediate of theends thereof, the opposite side ofeach of said translation devices being electrically connected with theopposite pole of said source.

2. The combination of a source of alternating electric current, tworeactance coils connected to each other in series, a core for each ofsaid coils, said cores being laminated and connected together at eachend to form a magnetic circuit, said coils being wound upon said coresin'such manner as to produce in both of said cores poles of likepolarity, the free end of one of said coils being connected to one poleof said source, a translatioh device connected at one side to the freeend of the other of said coils, and a translation device connected atone-side to said first coil at a point near the junction of and adaptedto form a magnetic circuit, said core including two legs, one of saidcoils be 'ing wound upon one of said legs and the other of said coilsbeing wound upon the other of said legs so as to produce poles of likepolarity in both of said legs when both of said coils are charged, atranslation device adapted to receive electric current In testimonywhereof, I hereunto afiix my through only the first coil of said series,a signature, in presence of two witnesses. translation device adapted toreceive electric current through both of said coils the sec- I ASKE' 0ndof said coils having a greater number of Witnesses: turns of theelectric conductor than the first GvoN SUccoMmH of said coils. ISAAC N.POWER.

